Tungsten
Tungsten is a hard white or off-white metal with strong physical properties, with element symbol W and chemical element number 74. It has the highest melting point of almost all non-alloyed metals. Pure tungsten is fragile and difficult to process. Tungsten metal through powder sintering metallurgy through the forging and rolling process, processing into plate, seam, steel wire and other forms. Pure tungsten is mainly used for filament of vacuum tube of heat-resistant material, welding electrode, electrical contact and other electrical fields.
